When does an artwork become expensive and why?

Which of the following performers applied earl scruggs banjo technique to the dobro josh graves tony trishchka jerry douglas bela fleck

What art form gives a real-life feel in terms of overall visual appearance?

In russian churches the number of domes usually matches the number of altars. but this church has only one altar dome, and 21 symbolic ones. what normal construction device does this church lack?